Haunched structure-based steel support structure for foundation pit

Abstract

A haunched component-based steel support structure for a foundation pit, including an enclosing purlin beam, a support beam located on an inner side of the enclosing purlin beam, and a triangular support arranged on the enclosing purlin beam. A first edge of the triangular support is fixedly arranged on the enclosing purlin beam. An end of the support beam abuts against a second edge of the triangular support to be supported on the enclosing purlin beam, and a haunched component is arranged between the enclosing purlin beam and a third edge of the triangular support. A first side of the haunched component is connected to the third edge of the triangular support, and a second side of the haunched component is connected to the enclosing purlin beam.

What is claimed is: 
     
       1. A haunched component-based steel support structure for a foundation pit, comprising:
 an enclosing purlin beam; 
 a support beam located on an inner side of the enclosing purlin beam; and 
 two triangular supports arranged on the enclosing purlin beam; 
 wherein a first edge of each of the two triangular supports is fixedly arranged on the enclosing purlin beam; the support beam comprises two inclined support beams arranged in a splayed manner; the two triangular supports correspond to the two inclined support beams, respectively; an end of each of the two inclined support beams close to the enclosing purlin beam is supported on the enclosing purlin beam through one of the two triangular supports, and abuts against a second edge of one of the two triangular supports; each of two haunched components is arranged between the enclosing purlin beam and a third edge of one of the two triangular supports; a first side of each of the two haunched components is connected to the third edge of one of the two triangular supports; and a second side of each of the two haunched components is connected to the enclosing purlin beam; and 
 the two triangular supports are arranged between two haunched components; the two haunched components are connected through a prestressed cable; and the prestressed cable is configured to provide a pre-tensioning force between the two haunched components. 
 
     
     
       2. The haunched component-based steel support structure of  claim 1 , wherein the prestressed cable comprises a plurality of prestressed cables; and one part of the plurality of prestressed cables are located above the two triangular supports, and the other part of the plurality of prestressed cables are located below the two triangular supports. 
     
     
       3. The haunched component-based steel support structure of  claim 1 , wherein each of the two haunched components is triangular. 
     
     
       4. The haunched component-based steel support structure of  claim 1 , wherein each of the two haunched components has an integrated structure; or
 each of the two haunched components is composed of two or more parts, and any adjacent two parts are boltedly connected. 
 
     
     
       5. The haunched component-based steel support structure of  claim 1 , wherein the two inclined support beams are arranged symmetrically. 
     
     
       6. The haunched component-based steel support structure of  claim 1 , wherein the two haunched components are made of steel; and a ribbed plate is arranged in each of the two haunched components to enhance strength of the two haunched components.